注释

src/MetaData.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+// MetaData类继承自Task类，负责处理任务的元数据
+public class MetaData extends Task {
+    private final static String TAG = MetaData.class.getSimpleName(); // 用于日志记录的TAG
+
+    private String mRelatedGid = null; // 存储相关任务的ID
+
+    // 设置元数据，包括任务ID和相关的元信息
+    public void setMeta(String gid, JSONObject metaInfo) {
+        try {
+            // 将任务ID放入元信息JSON对象中
+            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
+        } catch (JSONException e) {
+            Log.e(TAG, "failed to put related gid"); // 记录错误
+        }
+        setNotes(metaInfo.toString()); // 设置笔记内容为元信息的字符串表示
+        setName(GTaskStringUtils.META_NOTE_NAME); // 设置名称
+    }
+
+    // 获取相关任务的ID
+    public String getRelatedGid() {
+        return mRelatedGid;
+    }
+
+    // 检查当前对象是否值得保存
+    @Override
+    public boolean isWorthSaving() {
+        return getNotes() != null; // 如果笔记内容不为空，则值得保存
+    }
+
+    // 从远程JSON对象设置内容
+    @Override
+    public void setContentByRemoteJSON(JSONObject js) {
+        super.setContentByRemoteJSON(js); // 调用父类方法
+        if (getNotes() != null) {
+            try {
+                // 将笔记内容转换为JSON对象
+                JSONObject metaInfo = new JSONObject(getNotes().trim());
+                // 获取相关任务的ID
+                mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
+            } catch (JSONException e) {
+                Log.w(TAG, "failed to get related gid"); // 记录警告
+                mRelatedGid = null; // 设置为null以表示失败
+            }
+        }
+    }
+
+    // 此方法不应被调用，抛出异常
+    @Override
+    public void setContentByLocalJSON(JSONObject js) {
+        throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
+    }
+
+    // 此方法不应被调用，抛出异常
+    @Override
+    public JSONObject getLocalJSONFromContent() {
+        throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
+    }
+
+    // 此方法不应被调用，抛出异常
+    @Override
+    public int getSyncAction(Cursor c) {
+        throw new IllegalAccessError("MetaData:getSyncAction should not be called");
+    }
+}